Convertable outrigger trimiran

ABSTRACT

The CONVERTABLE OUTRIGGER TRIMIRAN allows a trihull cofiguration for anchoring with outriggers extended to stabilize the top heavy and spacious cabin deck and with outriggers withdrawn has a narrow hull for sailing manuverability and fuel economy. The bow V rudder provides torque for stability and steering when sailing with outriggers withdrawn. The bow V rudder also allows the ship to turn on a dime.

BACKGROUND OF THE INVENTION

In attempting to design a somewhat normal hulled ship with large cabins I came up with this design which allows a 16 foot wide hull at the waterline to have a 32 foot wide main deck which allows 14 foot wide cabins on both sides of a central corridor on a smaller than normal yaucht.

The unique bow rudder keeps the top heavy ship stable when sailing with outriggers pulled in and allows the ship to turn on a dime without listing.

SUMMARY OF THE INVENTION

This design provides the advantages of a trihull with large cabins and resistance to rolling in side swells with the advantage of a good length to width ratio of a standard hull for less drag and better maunerverability. A trimeran hull has more drag.

The bow V rudder keeps the ship from listing when turning and gives sure response to keep the ship stable when sailing with outriggers withdrawn. The V rudder not just stableizes but allows the ship to turn on a dime without listing.

DESCRIPTION OF THE DRAWINGS

FIG. 1 shows three views of the basic hull and maindeck with outriggers withdrawn and extended and the bow V rudder.

FIG. 2 shows the outriggers with hydralics which when withdrawn or extended will not tend to weep.

FIG. 3 shows starboard outrigger with hydralics exended and attachment points curved about the hindge to limit seepage into the cabin level through the deck.

FIG. 4 shows bow rudder configurations with turning hydralics.

FIG. 5 shows water pressures in a starboard turn from the bow perspective effecting turning and a righting force.

DETAILED DESCRIPTION OF THE INVENTION

The outriggers FIG. 1 1 when extended 2 make a trimarin hull which makes the topheavy ship stable when anchored or moving slow. This allows very wide cabins 3 with a narrow crusing hull. The hydralic attachment plates FIG.2 5 are curved about the hindges 4 allowing little seepage to enter the cabin level through slots in the deck.

The hydralics are extended when the outriggers are withdrawn limiting hydralic weeping and as the center of boyancy of the outriggers when extended 6 is outside the hindges there is little pull on the hydralic rods also limiting weeping. The bow rudder FIG. 5 10 when put to starboard creates not only steering thrust but creates torque 9 to keep the ship from listing. Very tight turns are possible. This V rudder also makes for responsive correction to listing when sailing with outriggers withdrawn. 

1. A system of extending outriggers from a basic ships hull so as to allow for a main deck wider than the hull thus allowing large cabins. a system of hydralics to effect the extension of the outriggers which are arranged to limit weeping and seepage of water into the cabin level.
 2. An arrangement of a V bow rudder which stabilizes the top heavy cabin deck when the outriggers are withdrawn and moving and allows the ship to turn on a dime. 